What receives information from outside the body to respond to stimuli and maintain
a: nervous system b: neuron c: nerve impluse

Natural selection acts on populations through a specific trait. which statement must be true about that trait? question 6 options: the trait is passed on genetically to the next generation. the trait has little impact on survival. the trait is the same for all organisms. the trait is resistant to mutations.

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false

What were the main components of earth’s earliest atmosphere? oxygen and ammonia hydrogen and helium oxygen and nitrogen hydrogen and nitrogen